Spraying mechanism



ug. 22, 1933- A. c. ANDREASEN SPRAYING MECHANISM Filed March 22, 1930 2Sheets-Sheet l Aug. 22, 1933. A. c. ANDREASEN SPRAYING MECHANISM FiledMarch 22, 1930 2 Sheets-Sheet 2 Patented Aug. 22, 1933 UNITED STATESPATENT OFFICE SPRAYING MECHANTSM poration of Illinois Application March22,

2 Claims.

This invention relates to spraying mechanism and more particularly tomechanism of the character whereby liquid may be forced under pressureand discharged, and admixture of air combined as desired. An object ofthe invention resides in the provision of mechanism in which liquid isforced by air pressure through a discharging nozzle, utilizing a head ofpressure upon the body of the liquid and providing for utilizing suchair as a mixing agentJ with the discharged liquid. More particularly, anobject of the invention is the provision of a device comprising a liquidcontaining receptacle and an air pump inY association therewith, wherebyair under pressure causes discharge of the liquid through a dischargingnozzle and such compressed air may also be utilized as a mixing agentwith the discharged liquid. A further specific object resides inproviding a device in which the air pressure utilized to discharge theliquid is so conveyed and distributed as to set up an agitation in theliquid, which is particularly advantageous when using spraying compoundsor other materials requiring constant or periodical agitation tomaintain a uniform con- 23 dition of the contents.

Other objects will appear hereinafter.

The invention consists in the combinations and arrangements of partshereinafter described and claimed.

The invention will be best understood by reference to the accompanyingdrawings forming a part of this specification, and, in which:

Fig. 1 is a vertical sectional view of a device embodying the featuresof the invention;

Fig. 2 is a sectional View taken substantially on the line 2 2 of Fig.1;

Fig. 3 is a vertical sectional View taken substantially on the line 3 3of Fig. 2;

Fig. 4 is a vertical sectional View taken sub- 40 stantially on the line4 4 of Fig. 2;

v Fig. 5 is a horizontal sectional view taken substantially on the line5 5 of Fig. 1; and

Fig. 6 is a detail view, partly in elevation and partly in section, ofthe discharging nozzle.

As illustrated in the drawings, the preferred embodiment of themechanism includes a liquid containing receptacle 9, an air compressioncylinder l0 and an intermediate housing 1l. Housing 1l may be providedwith a flange 12 adapted to be bolted to a complementary flange 13 uponthe receptacle or tank 9, and the latter is otherwise preferablyhermetically sealed. Similarly, cylinder l0 may be suitably bolted tothe intermediate housing 11, as shown in Fig. 1. Mounted forreciprocation within cylinder 10 is a piston 1930. SerialY N0. 438,005(Cl. 299-89) or plunger 14 secured to piston rod 15 which extendsupwardly through the cylinder 10 and is secured to a connecting member16 pivoted to operating handle 17. Handle 17 may be convenientlyconnected for manual operation by a link 18 pivoted to the device at 19.The intermediate housing 11 is preferably divided into three; verticalcircular chambers, a relatively large chamber 20, a smaller chamber 21and a second smaller chamber 22. Chamber does not communicate with thepump chamber 23, but a tubular member 24 is preferably threaded in theportion constituting the chamber 20 and extends to a point adjacent thebottom of tank 9, as shown in Fig. 1. A liquid discharge tube 25 is alsoconnectedto communicate with chamber 20, as shown inV Fig. 3. Chamber 22does'not communicate with pump chamber 23 but communicates with theinterior of tank 9 by means of duct 26, and an air discharge tube 27also is connected to the portion constituting chamber 22, as shown inFig. 4.

Chamber 21 communicates with pump chamber 23 by means of a check valve28 normally held seated by compression spring 29, as shown in Fig. 3,and connected to the portion constituting this chamber is a dependingair pipe 30 connected at the lower end with a circular pipe 31, as shownin Fig. 5. Pipe 31 is preferably provided with a plurality of uniformlyspaced perforations 32 for the purpose of permitting a uniform dischargeof air adjacent the bottom of tank 9 whereby the air will pass upwardlythrough liquid 33, as shown in Fig. l.

A manually operated valve 34 is provided in air tube 27 adjacent chamber22, and liquid tube 25 and air tube 27 terminate in a discharge nozzle35. As shown in Fig. 6, the connections of tubes 25 and 27 convergewithin nozzle 35, but the respective liquid and air ducts are providedwith manually operated valves 36 and 37, respectively, whereby the flowand admixture of liquid and air may be regulated. A ball check valve 38is provided in a chamber 39 communieating with the cylinder chamber 23and the exterior of the device. This valve is for the purpose ofallowing air to be drawn within the cylinder chamber 23 upon theupstroke of piston 14 but closes upon the downstrolre. The reverseaction takes place on check valve 28 which opens on the downstroke ofpiston 14 and closes on the upstroke. There is provided a compressionchamber 40 in the upper portion of tank 9 above the liquid 33.

When rectilinear motion is set upl in the piston 14, air is forceddownwardly through pipe 30 and expelled through perforations 32 incircular pipe 31 disposed adjacent the bottom of tank 9. This expellingof air causes the liquid 33 to be agitated and the liquid or liquidcompound is stirred as the air passes upwardly therethrough. Thereaftera pressure is set up in the chamber 40, which forces liquid upwardlythrough tubular member 24 within chamber 20 and outwardly through theliquid discharge tube 25. When it is desired to cause a mixture of airwith the liquid for spraying purposes, valve 34 may be opened andproperly adjusted. A further adjustment of the liquid and air mixture isfurnished by valves 36 and 37.

While I have illustrated and described the preferred form ofconstruction for carrying my invention into eect, this is capable ofvariation and modication without departing from the spirit of theinvention. I, therefore, do not wish to be limited to the precisedetails of construction set forth, but desire to avail myself of suchvariations and modications as come within the scope of the appendedclaims.

What I claim as new and desire to secure by Letters Patent is:

1. A device of the class described, comprising a liquid containingreceptacle having an annularly flanged opening at the top thereof, ahousing having a ilanged end portion Afor attachement to the flange ofsaid receptacle, said housing being provided with a liquid outletchamber, a tubular member connected to said outlet chamber and extendingdownwardly within liquid in said receptacle, said housing being providedwith an air inlet chamber, a tubular member connected to said air inletchamber and extending downwardly parallel with and adjacent to said rstmentioned tubular member within liquid in said receptacle, a perforatedair distributor at the lower end of said second mentioned tubular memberand disposed within liquid in said receptacle near the bottom thereof,said housing being provided with an air outlet chamber communicatingwith said receptacle, a discharge nozzle connected to said liquid outletchamber and said air outlet chamber, respectively, by separatevalvecontrolled pipes, and an air pump communicating with said air inletchamber, said pump being detachably secured on the upper end portion ofsaid housing.

2. A portable device of the class described,

comprising a cylindrical liquid containing tank normally resting on itsend, said tank having a central opening in its upper end, a generallycylindrical housing having provision for detachable liquid-tightattachment to the opening in the top of sadtank, a pump detachablysecured to the upper end of said housing, said housing constituting ineffect a restricted necked connection between said tank and said pump,said housing having an air inlet chamber communicably connected withsaid pump, a tubular member communicably connected at its upper end tosaid air inlet chamber and projecting downwardly into liquid in saidtank and terminating communicably near the bottom of the tank, saidhousing having therein a liquid outlet chamber,- a second tubular membercommunicably connected at its upper end with said liquid outlet chamberand extending downwardly within liquid in the tank and terminatingcommunicably near the bottom of the tank, said housing having therein anair outlet chamber in communication with said tank, a discharge nozzle,a manual valve controlled communicable pipe connection between saidnozzle and said liquid outlet chamber, and a separate manual valvecontrolled communicable pipe connection between said nozzle and said airoutlet chamber.

ALFRED C. ANDREASEN.

